Refrigerating apparatus



"esj 6, 46. 'y E, s, DYBVIG Y REFRIGERATING APPARATUS I INVENTOR. 6 wm s. ww@

Aug. 6, i946 E. S. DYBVIG REFRIGERATING APPARATUS 3 Sheets-Sheet 2 IIZ l /Jo Filed Jan. 31, 1944 m w L ZAOESA i Aug.. 6,1946. E. s. DYBVIG REFRIGERATING APPARATUS Y, 5 Sheets-Sheet Filed Jan. s1, 1944 INVENTOR.

Patented Aug. 6, 1946 l REFRIGERATING APPARATUS Edwin S. Dybvig, Dayton, Ohio, assigner to General Motors Corporation, Dayton,

poration of Delaware Application January 31, 1944, Serial No. 520,435 23 claims. V(c1. s2-129) This invention relates `to refrigerating apparatus andmore particularly to an improved air conditioning unit,

One object of this invention is to provide an air conditioning unitcapable' ofl either heating the air or cooling the air wherein the changeover from heating to cooling or vice versa may be accomplished without the use of refrigerant flow changeover valves or complicated air directing dampers. i L

Another object of' this-inventionis to provide a self-contained window unit which may be manufactured and sold at a low cost.

Another object of this invention is to provide a self-contained window unit which is quiet in operation and at the same time capable of handling a large volume of air.

Another object of this invention'is to provide a modifled'reverse cycle type of air conditioning unit wherein the changeover from heating to cooling may be accomplished by the manipulation of a single knobwhich also serves to regulate Y the amount of fresh air introduced into the space `to be conditioned.

More particularly it is an object of this invention to provide a rotatable unit wherein the changeover from heating to cooling is accomplished by rotating the unit.

Another object of this invention is to provide a rotatable unit wherein the rotation of the unit determines the quantty of fresh air introduced into the room and wherein anywhere from to 100% fresh air may be introduced into the room.

A further object of this invention` is to provide a reverse cycle system wherein the amount of air ilowing over the condenser is automatically restricted whenA the unit is used for heating pur'- poses.

A further object of this invention is to provide a reverse cycle unitk wherein the fan motor is at all times located in the stream of air which flows over the condenser.

A still further Object of this invention is to provide a reverse cycle air conditioning unit which provides for humidiflcation of the air duringthe heating cycle.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawingsy wherein a preferred form of the present invention is clearly shown,

In the drawings:

Fig. 1 is a vertical sectional view of an air conditioning unit embodying features of my invention; Y

Ohio, a cor- Fig. 2 is a horizontal sectional view looking down upon the apparatus within the main casing;

Fig. 3 is a View somewhat similar to Fig. 2 but on atsmaller scale for diagrammatically showing the air flow through the unit when the unit is used'fr 100% Ventilation;

Fig. 4 shows the air flow through the unit when used for heating the air;

Fig. 5 is a horizontal sectional view showing a modified arrangement; i

Fig. 6 is a diagrammatic view showing the air flow when the unit is used for heating the air;

Fig. 'l is a vertical view of the modification shown in Fig. 5 with the outer casing broken away;

Fig. 8 shows a tion;

Fig. 9 is a vertical sectional view showing a still further modied arrangement embodying features of my invention; and Y Fig. 10 is a horizontal sectional View taken on line lll-l0 of Fig. 9.

Referring now to Fig. 1 of the drawings wherein a simplied form of my invention has been shown, reference numeral l0 designates the main casing of theunit which is adapted to be rotatably supported in a window opening by means of journals l2 and lll which, for purposes of illustration, have been shown as secured to tne top and bottom walls of the casing lll as shown. The journal l2 is rotatably supported in the'bearing I6 which may be secured directly to the lower sash rail I8. The lower journal lll is supported in the stationary bearing 20 which may be secured in any suitable manner to the window sill 22. The space between the outer walls of the casing lil and the window jamb are filled in by means of the filler elements 2li. The elements 24 carry suitable gaskets 26 which seal the joint between the casing l and the filler elements 24, rIhe gaskets 26 may be of any suitable material and construction. Thin rubber strips or the like may be used for this purpose.

Within the casing It there is mounted a conventional volatile refrigerant system which includes an evaporator 30,*a ycondenser 32 and a motor compressor unit 3. Compressed refrigerant is discharged from the compressor through the vapor line 36 which preferably leads to the lowest pass of the condenser 32 for a purpose to be explained more fully hereinafter, densed refrigerant is supplied to the evaporator through the liquid line 38 in which there is mounted a conventional ilowv control device 40 which may be either a fued restricter, a thermomodiiied outer casing construc- The con- Vknob 18 carried 3 static expansion valve or any other type of suitable control. The vaporized refrigerant is returned to the compressor through the suction line d2.

A partition 44 divides the interior of the casing il into two compartments as shown, one of which serves as the condenser compartment and the other of which serves as the evaporator compartment. A fan motor 46 is provided which operates both the condenser fan 48 and the evaporator fan 50. Condenser cooling air enters the casing l through the inlet 52 and the heated air is discharged through the outlet 54.Y `The air to be cooled enters the casing through the screened inlet 55 and is discharged through the screened outlet 58. The partition 65 directs the flow of air through the condenser compartment whereby the air comes in over one portion of the condenser and is discharged to the outside over the other portieri of the condenser. l Thepartition 62 directs the `flow of air in the evaporator compartmentV in accordancevwith Well-knownpractice. 'y Y Y f A filter arrangement 64 is provided in the condenser compartment which serves the multiple purpose of filtering the air, absorbing fan noise and equalizing the distribution of air over the condenser. A filter 66 is provided inthe evaporator air stream and serves the multiple purpose of filtering the air, absorbing the fanrnoise and uniformly distributing the flow of air over the evaporator. Y Y Y l The evaporator will condense moisture from the air during both the heating cycle and the cooling cycle. For that reason it becomes necessary to provide some means of disposing of the condensate during both the heating cycle and the cooling cycle. In the device shown 4in- Figures 1 through 4, the condensate collects inthe pan 68 which is mounted beneath the evaporator 3'0 and then drains intopthe bottomwofithehcondenser compartment through the drainlinej. By virtueof this construction the entire bottom of the condenser compartment will tend tobe covered by theucondensate Water whereby the exposed surface of the condensate water in the condenser compartment will be very great. Furthermore the hot compressed refrigerant leaving the compressor is caused to first flow through the bottom passes of the condenser with the result that the condensate Water will be heated. i VThe air flowing through the condenser compartment is relatively Warm air and will serve to vaporize the condensate water. y

The partition 44 which separates the condenser compartment from the evaporator compartment 1 is provided with an opening f|2 Whichis normally closed by the damper 'I4 but which may be opened When the apparatus is used for heating the air and it is desired to introduce fresh outside air into the enclosure. 'A

The casing |0 is provided with a stop "I6 which serves to limit the rotation of the casing |tl.` The stop 76 engages the iillerelements 24 at opposite extremes of rotation asshovvn in Figs. 2and4. A by the casingn |01' is`provided for rotating thecasing I8. By virtue of the arrangement of the various inlets and outletsv 'for the casing l0, the changeover from cooling to heating may be accomplished simply by rotating the casing from the position `shown in'Fig. 2v to the position shown in Fig. 4. It is deviousv that the unit may be set at any intermediate position so as tn provide various othereifects. Thus. by rotating the casing |0 from theY position 4in' 'which it is shown in Fig. 2 to the position in which it is shown in Fig. 3 the unit may be used as an all fresh air Ventilating unit or it may be used as an all fresh air cooling unit in which outside air is introduced into the evaporator compartment, cooled and thereafter discharged into the room. It is also apparent that any proportion of fresh air may be introduced into theevaporator compartment by rotating Vthe casing vthe proper amount. A `The arrangement of the evaporator compartment inlet 56 and the condenser compartment inlet 52 relative to the ller elements 24 is such that when the casing I0 is first rotated from the posiytion in which it is shown in Fig. 2, outside air will beintrojduced into the evaporator compartment before anyuof the room air will be pulled into the condenser compartment. This makes it possible to maintain a positive pressure within the enclosure which serves to prevent infiltration of unconditioned air into the room through cracks and the like when fresh air is being introduced through the evaporator compartment.' Opening of the damper 'I4 during the heating cycle (Fig. 4) will likewise Ltend to maintainv a positive' pressure Within the enclosure during the heating cycle.

In order to simplify the disclosures in this application', no pointers or indicators have been shown for indicating the type of airconditioning produced by the apparatus in the various positions thereof, whereas .in actual practice Some form of indicatorswouldbe used..

Referring now to Figs.V 5, 6 and ,7; wherein I have shown a modified arrangement, reference Y numeral |00 designates a stationary, cylindrical casing which is adapted to be SupportedV within the Window opening and which serves torpartially enclose an inner rotatable Vcasing |02 which cor'- responds tothe casing |.0fof the arrangement described hereinabove. By virtue of thev double casing arrangement shown in Figs. 5 through 7 the'inner casing may be made Without any deco@ rative'finish and the outer casing which is a stationary casing may be provided with a special decorative finish at least on the room side.

'Asl shown in Fig. 5 the outer casing |00 is provided with a plurality of peripheral openings |04 through H0 as shown. The inner casing is provided with a plurality. of screened openings ||2.through` 8 which are arranged as shown. Aip'artition |20 separates the inner casing I0 into an"4 evaporator compartment |22 and e. condenser compartment |24. A condenser |30 is mounted in the condenser compartment .as shown. An evaporator |32v is mounted in the evaporator compartmentl as shown. Aicompressor |34 Withdraws vaporized refrigerant from the evaporator |32 and discharges compressed refrigerant into the condenser |30. The condensed refrigerant flows into the evaporator |32 'through the line |34 in which a suitable refrigerant flow control device |36 is provided. The'ccntrol device |36 may berof any suitable type such as a fixed restricter orv some form of expansion valve.

A -fan |40 is arranged within the condenser compartment for circulating air as indicatedby the arrows. A fan |42 is provided inthe evaporator compartment for circulating air through the evaporator compartment as indicated bythe arrows.v Thefans |40 and motor |44 which is' disposed Within the condenser compartment |24 as shown.V Gaskets ldtffare provided for sealing the joint'between theinner 'casing |02'and the outer casing |00. soasto pre- 'vent the leakage of air between'thetvvo casings.

A suitable filter element |48 is providedfor |42 are drivenv by the filtering the air discharged from the condenser compartment. A similar filter |50 is provided for filtering the air discharged from the evaporator compartment. These filters are preferably mounted the same distance from the central axis so as to be removable through the door |52 provided in the upper wall of the casing as shown in Fig. 7. By virtue of this arrangement the conthespace vto be conditioned, the evaporator in this position of the apparatus is arranged adjacent the central opening |00 of the casing |00, whereby Ythe conditioned air is discharged directly to the front and the return air is taken in through the side openings |08 and H0. While the arrangement of openings may be varied, the particular arrangement shown has considerable merit from the standpoint of uniform distribution of air within the conditioned space.

In Fig. 6 I have diagrammatioally shown the arrangement of the elements when it is desired to heat air for the enclosure. It will be noted that in this arrangement a portion of the condenser is blocked off by the wall portion |02 provided between the openings |00 and |09 in the outer casing |00. By blocking off a portion of the condenser in this manner, when the condenser is used for heating the air within the enclosure to be conditioned, the condenser is caused to operate at a higher temperature than would otherwise be the case. This not only improves the comfort within the conditioned space but also increases the eiciency of the apparatus during the heating cycle.

While I have shown the inner air conditioning casing |02 in only the two positions it is apparent that the inner casing may occupy any intermediate position as explained in connection with the embodiment shown in Figs. l through 4.

The .condensate water which collects on the evaporator |32 will drain into the condensate collecting pan |64 from whence the condensate may be drained into the receptacle |00 provided in the condenser compartment beneath the condenser fan |40. This arrangement for disposing of condensation has been shown for purposes of illustration only as any suitable condensate removal means maybe used. Inasmuch as this type of condensate removal means is well known to those skilled in the art it will not be described in greater detail.

For those installations wherein the appearance of the apparatus is of importance only on the inside of the conditioned space a semi-circle outer casing element |10 may be substituted for the cylindrical outer casing |00 shown in Figs. 5, 6 and '7. The casing |10 may be provided with integral projections |12 which ll in the space between the wall of the cabinet and thewindow jambs. The casing section |10 is provided with openings arranged in the same manner in which the openings are arranged in the casing |00. These openings have been given the same reference numerals as the corresponding openings provided in the casing |00.

It will be noted that for purposes of illustration the casing shown in Figs. 1 through 4 is mounted substantially in the center of the window opening whereas in a modification shown in Figs. 5 through 'I the major portion of the apparatus is disposed on the outside of the enclosure. For those installations wherein the window opening is very narrow, a still greater portion of the unit may be disposed on the outside in which case the various air openings would have to be made smaller. If desired, the outer stationary casing may be made in` other shapes such as rectangular oval or the like.

In Figs. 9 and l0 I have shown a still further modification wherein the main casing designated by the reference numeral 200 is a relatively high cylindrical casing which also is rotatably supported within a window opening. In this modication the evaporator 202 is disposed in the upper portion of the cabinet 200 and the condenser 204 is disposed in the lower portion of the cabinet 200. The Wall 206 separates the evaporator compartment: from the condenser compartment. A motor compressor unit 208 is arranged within the condenser compartment as shown. AVaporized refrigerant is conveyed from the evaporator 202 to the motor compressor 208 through the suction line 2|0. Compressed refrigerant ows from the unit 208 to the condenser 204 through the line 2|2. The condensed refrigerant flows from the condenser to the evaporator through the liquid line 2|4 (see Fig. 10) wherein there is provided a suitable refrigerant flow controlrdevice 2|0 which may be of the fixed restrictor type or may be of the expansion valve type. Air to be conditioned during the cooling cycle is introduced into the evaporator compartment through the inlet 2|8 and is discharged through the outlet 220. A fan 222 is provided, as shown, for circulating the air over the evaporator. A similar fan 224 is provided for bringing condenser air in through the condenser air inlet 220 and for discharging the heated air through the outlet 228. With the apparatus in the position shown in Fig. 9, outside air is circulated over the condenser and inside air is circulated over the evaporator. By rotating the assembly approximately degrees, inside air would be circulated over the condenser so as to be heated thereby and outside air would be circulated over the evaporator so as to heat the evaporator. A fan motor 230 is provided as shown for operating the fans 222 and 224. It will be noted that this fan motor is at all times disposed within the air stream which is to be heated. Condensate collects in the pan 232 from whence it drains through the pipe 234 into the lower portion of the condenser compartment wherein it comes in contact with the lower portion of the condenser 204 and the lower portion of the motor compressor unit 208. The air owing in over the condensate will cause evaporation of the condensate water in accordance withwell-known principles. Y f

In order to simplify the disclosures herein, no automatic controls have been shown. However, th'e unit lends itself well to automatic controls which may be used to regulate both the temperature and the amount of fresh air introduced into the conditioned space.

While the form of embodiment of the invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, as may come within Ythe scope of ther claims which follow.

What is claimed is as follows:

1. Air conditioning apparatus of the self-contained type comprising in combination, a cylindrical cabinet adapted to be supported in an opening in a wall with one portionnof the cabinet projecting into the outside atmosphre and anotherV portion projecting into the space to be conditioned, a refrigerating system including an evaporator and a condenser connected to said evaporator and mounted within said cabinet, means for flowing one stream of air in thermal exchange with said evaporator, means for flowing another stream of air in thermal exchange with said condenser, said cabinet having a, plurality of peripheral openings forthe of said air streams, and means for rotatably mounting said cabinet whereby the points of ingress and egress of said air streams may be shifted.

2. Air conditioning apparatus of the self-contained type comprising in combination, a cabinet adapted to be supported in an opening in a wall with one portion of the cabinet projecting into the outside atmosphere and another portion projecting into the space to be conditioned, a support within said cabinet, a refrigerating system including an evaporator and a condenser mounted on said support, means for ilowing one stream of air in thermal exchange with said evaporator, means for cwing another stream of air in thermal exchange with said condenser, said cabinet having a plurality of peripheral openings for the ingress and egress of said air streams, and means for rotatably mounting said support whereby the points of ingress and egress of said air streams may be shifted.

3. In combination, a wall of a room having an opening therein, a cabinet disposed Within said opening and projecting on opposite sides of said wall, refrigerating apparatus including a heat absorbing element and a, heat dissipating element, mounting means supporting said elements within said cabinet, means for flowing air over said elements, and means for rotating said elements whereby either of said elements may be disposed within said room.

4. Air conditioning apparatus for an enclosure comprising in combination, a condenser element, an evaporator element, a compressor, refrigerant flow connections between said elements and said compressor, and means for moving one of said elements into and out of thermal exchange 'with air to be'conditioned' for said enclosure.

5. In an air conditioning unit, refrigerating apparatus including a heat absorbing element and a heat dissipating element, a cabinet enclosing said apparatus including movable air inlet means and air outlet means, fan means for flowing air in thermal exchange with said elements, and Vmeans for moving certain of said air inlet means and air outlet means from alignment with one body of air into alignment with another body of air.

6. The method of air conditioning an enclosure which comprises evaporating a refrigerant in a 'rst zone, condensing theivaporized refrigerant in a second zone, operating a first air propelling means so as to propel one stream of air through said 'iirst zone and into said enclosure so as to cool said enclosure, operating a second air propelling means so as to propel another stream of air through said second zone and into the outside atmosphere; and interchangin'g the relative positions of said vzone and said air propelling means so as to discharge air f-rom'saietlsecond ingress and egress casing for zone'into said enclosure so as to heat said enclosure.

'7. In combination with a wall of an enclosure provided with' a window opening, a rotatable air conditioning unit mounted for rotation Within said opening with portions projecting from opposite sides of saidL wall, a stationary casing covering that portion of the unit which projects into said enclosure, said casing having an integral portion located in the plane of said opening for lling in the space between the edge of the Window opening and said unit, said unit including means for discharging either heated or cooled air into said enclosure.

-8. An air conditioner for a room comprising a casing having rst opening means for communication with' the atmosphere outside of a room space and having second opening means for communication with the room space, refrigerating apparatus within said casing including a heat absorbing element and a heat dissipatlng element, fan means for circulating air over each of said elements, means for adjustably supporting said refrigerating apparatus relative to said opening means whereby air from either the room space or the atmosphere may be circulated over either of said elements by said fan means.

9. Air conditioning apparatus for an enclosure comprising in combination, an evaporator element, a condenser element, a compressor, refrigerant flow connections between said elements and said compressor, and means constructed and arranged to so hold said evaporator element and said condenser element as to permit movement of said elements into and out of thermal exchange with air to be conditioned for said enclosure.

10. Air conditioning apparatus comprising in combination, a support, a refrigerating system including a heat dissipating element and a heat absorbing element carried by said support. a cabinet at least partially enclosing said elements and including an inlet for air to be conditioned and an outlet for conditionedair, means for flowing air through said cabinet, and means for rotatably mounting said support within said cabinet so as to selectively heat or cool the air flowing through said cabinet.

11. An air conditioner for a room comprising a casing having rst opening means for communication with the atmosphere outside of 'a vroom space and having second opening means for communication with the room space, refrigerating apparatus includingan evaporator element and a condenser element, a support for said apparatus,

means carried by said support for circulatingair` over each of said elements, partition means carried by said supportand cooperating with saidl separating the air flowing over said evaporator element from the air owing over said condenser element so as to establish two air streams, and means for movably mounting said support relative to said casing so as to shift saidalr' streams relative to said iirst and second openings.

l2. Air conditioning apparatus comprising in combination, a substantially cylindrical housing', refrigerating apparatus comprising'a heat absorb-l ing eiement and a heat dissipating elementsup port means for mounting said elementswithin said housing, said support means includingin cooperating with said housing to form api of air flow passages, afan inv 63911.@ se', t n sages, said housing having ajpluralityfof circumferentially disposed air openings constitutin lets and outlets `for said passages, and lne rotatably mounting said support means within said housing vso as to provide for realignment of said air flow passages with said openings.

13. Air conditioning apparatus comprising in combination, a substantially cylindrical housing, refrigerating apparatus comprising a heat absorbing element and a heat dissipating element, support means for mounting said elements within said housing, said support means including means cooperating with said housing to form a plurality of air low passages, a fan in each of said passages, said housing having a plurality of circumferentially-disposed air openings constituting inlets and outlets forsaid passages, means for rtatably mounting said support means within said housing so as to provide for realignment of said air ow passages with said openings, and means for partially blocking the flow of air over said heat dissipating element in one position of said support.

14. In combination, a wall having an opening therein, a cylindrical cabinet disposedwithin said opening and projecting on opposite sides of said wall, refrigerating apparatus including a heat absorbing element and a heat dissipating element, mounting means supporting said elements within said cabinet, means for flowing air over said elements, said cabinet having air inlets and outlets arranged along the periphery of said cabinet, means for rotatably mounting said cabinet, and means at least partially enclosing that portion of the cabinet projecting on the one side of said wall, said last named means having an air inlet opening and an air outlet opening.

15. In combination, a wall having an opening therein, a substantially cylindrical air conditioning unit disposed Within said opening, means for mounting said unit for rotation within said opening, said unit comprising a rotatable housing having peripheral openings for the ingress and egress of air and means for circulating air to be conditioned in through one of said openings and out through another of said openings.

16. In combination, a cylindrical casing, means for rotatably supporting said casing within an opening in a wall, an evaporator disposed within the upper part of said casing, a condenser disposed within the lower portion of said casing, a compresssor, means connecting said evaporator,

compressor and condenser in refrigerant flow of relationship, means dividing said casing into an evaporator compartment and a condenser compartment, a fan means for flowing air in thermal exchange With said evaporator, ian means for .owing air in thermal exchange with said condenser, said evaporator compartment having an air inlet and an air outlet, said condenser compartment having an air inlet and an air outlet disposed substantially on the opposite side of said casing from said evaporator air inlet.

17. In combination, a cylindrical inner casing, means dividing said casing into an evaporator compartment and a condenser compartment, an outer casing enclosing said inner casing, means for rotatably mounting said inner casing, gasket means provided between said inner casing and said outer casing so as to restrict the flow of air between said inner casing and said outer casing, `openings in said outer casing for the ingress and egress of air, air inlets and air outlets for said inner casing, an evaporator in said evaporator compartment, a condenser Within said condenser compartment, a compressor, refrigerant flow connections between said evaporator, compressor and condenser, fan means for owing air in thermal exchange with said evaporator, fan means for flowing air in thermal exchange with said condenser, means for collecting the condensate formed on said evaporator, and means for discharging said condensate into said condenser compartment, and means for disposing of the condensate into the condenser air stream.

18. In combination, a wall having an opening therein, an air conditioning unit including a heat absorbing portion and a heat dis'sipating portion disposed within said opening, means for rotatably mounting said unit within said opening, fan means for circulating a rst stream of air in thermal exchange with said heat absorbing portion and a second stream of air in thermal exchange with said heat dissipating portion, said unit comprising a rotatable housing having circumferentially arranged openings constituting inlets and outlets for said air streams whereby upon rotation of said housing said inlets and outlets may be moved from one side of said Wall to the other side thereof.

19. Air conditioning apparatus for an enclosure comprising in combination, reirigerating apparatus including an evaporator and a condenser, a fan for flowing one air stream in thermal exchange with said evaporator, a fan for iiowing another airY stream in thermal exchange with said condenser, and means movable through one range of positions for varying the quantity of fresh air introduced through said unit into said enclosure, said last named means being movable beyond said range to another position for changing the unit from an air cooling unit to an air heating unit.

20. Air conditioning apparatus for an enclosure comprising in combination, reirigerating means including an evaporator and a condenser, meansfor ilowing one stream of air in thermal exchange with said evaporator, means for flow-- ing another stream of air in thermal exchange with said condenser, said apparatus including means movable through one range of positions for varying the ratio of fresh air to recirculated air flowing in thermal exchange with said evaporator, said last named means being movable beyond said one range of positions to another position in which air from said enclosure is circulated in thermal exchange with sai-d condenser and returned to said enclosure.

21. An air conditioner for a room comprising a casing having opening means for communication with the room and with the atmosphere outside of the room, refrigerating apparatus including an evaporator element and a condenser element, a support for said apparatus, means for circulating air over each of said elements, partition means cooperating with said casing for separating the air owing over said evaporator element from the air owing over the condenser element so as to establish two air streams, and means for movably mounting said support so as to selectively direct either one oi said air streams into said room and the other of said air streams into the outside atmosphere.

22. Air conditioning apparatus of the self-contained type comprising in combination, a cabinet adapted to be supported in an -opening in a wall with one portion of the cabinet projecting into the outside atmosphere and another portion projecting into the space to be conditioned, a support Within said cabinet, a refrigerating systern including an evaporator and a condenser mounted on said support, fan means for flowing one stream of air in thermal exchange with said evaporator, fan means for owing another stream of air in thermal exchange with said condenser, said cabinet having a plurality of peripheral openings for the ingress and egress of said air streams, a single motor for operating both of said fan means and means for rotatably mounting said support whereby the points of ingress and egress of said air streams may be shifted.

23. Air conditioning apparatusof the self-contained type comprising in combination, a cabinet adapted to be supported in an opening in a Wall with one portion of the cabinet projecting4 into the outside atmosphere and another portion projecting into the space to be conditioned, a support within said cabinet, a refrigerating system including an evaporator and a condenser mounted on said support, means for flowing one streamv of air in thermal exchange with said evaporator, means for owing another stream of air in thermal exchange with said condenser, said cabinet having a plurality of peripheral yopenings for the ingress and egress ofy said air streams, and means for rotatably mounting said support whereby the points of ingress and egress of said air streams may be shifted, said condenser having one portion located adjacent' one of said openings for the ingress of air and having another portion located adjacent one of said openings for the egress of air whereby the air stream iiowing in thermal exchange with said condenser flows in over one portion of said condenser and ows out over another portion of said condenser.

' EDWIN S. DYBVIG. 

